Below is a radial velocity curve for a spectroscopic binary. Which of the stars is most massive? ____________________ 
Definitions:
Independent Variables
are variables in an experiment that are manipulated or controlled by the experimenter to investigate their effect on dependent variables.
Independent Variables
In an experiment, these are variables manipulated by the researcher to observe how they affect the dependent variable.
Typing Speed
A measurement of how many words or characters one can type in a set amount of time, often gauged in words per minute (WPM).
Keyboard Design
The arrangement and layout of keys in a keyboard, which includes considerations of ergonomics, usability, and efficiency for typing.
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